createBeanFactoryBasedTargetSource(Class beanClass,
String beanName)
Subclasses must implement this method to return a new AbstractPrototypeBasedTargetSource
if they wish to create a custom TargetSource for this bean, or null if they are
not interested it in, in which case no special target source will be created.

createBeanFactoryBasedTargetSource

Subclasses must implement this method to return a new AbstractPrototypeBasedTargetSource
if they wish to create a custom TargetSource for this bean, or null if they are
not interested it in, in which case no special target source will be created.
Subclasses should not call setTargetBeanName or setBeanFactory
on the AbstractPrototypeBasedTargetSource: This class' implementation of
getTargetSource() will do that.